Bra Cup Types: What They Mean and How to Choose the Right Cup Shape
This has probably happened to you: you love a bra, but when you try it on, something feels “off”. Often, the issue is not the design. It is choosing the wrong bra cup type for your body and your bust shape.
At Ysabel Mora, we believe the perfect bra is not only the one that fits well, but the one you barely notice you are wearing. That is why this guide breaks down bra sizing and bra cup types, so you can find your best everyday match with confidence.
What is a bra cup?
A bra cup is the part of the bra designed to cover, support and shape the bust. In practice, the cup influences how your bust sits in the bra and how it looks under clothing.
Choosing the right type of bra cup matters because a well-matched cup follows your natural shape, reduces discomfort caused by pressure or gaping, and improves stability as you move. The goal is comfort and support without “correcting” your body.
Cup size vs band size: what is the difference?
The difference between cup and band is simple: the band sets the fit around your ribcage, while the cup represents bust volume relative to that band. Understanding both is the first step to finding your correct bra size.
- The band size: shown as a number (for example 80, 85, 90, 95...). It is your underbust measurement, taken around the ribcage, just under the bust.
- The cup size: shown as a letter (A, B, C, D...). It indicates bust volume in relation to the band size.
Two people can share the same band size (for example, 95) and need different cups, because cup size depends on bust volume. That is why knowing the different bra cup types and your correct size makes the difference between “wearing a bra” and “feeling good in it”.
If you would like to explore lingerie styling too, you can read our guide on types of lingerie for every occasion.
Bra cup types: key differences
Bra cup types differ mainly in structure, level of support, coverage, and the visual effect they create. Choosing a cup type is not only about style: it affects how support is distributed, how the bra adapts to your body, and how comfortable it feels over a full day.
Non-padded (unlined) cup
A non-padded or unlined cup follows the natural bust shape without adding extra volume. It offers a light, breathable feel and a discreet finish, without visually increasing bust size.
Push-up cup
A push-up bra cup is designed to lift the bust and bring volume towards the centre, creating a more defined cleavage. It does not change your “real” size. It changes the shape and the visual effect under clothing.
Balconette (half-cup)
A balconette or half-cup bra has a lower cut that leaves the upper bust more visible. It offers a gentle lift and a flattering neckline, making it ideal for square necklines and lower-cut tops.
Full cup (high coverage)
A full-cup bra offers more coverage and is designed to support the whole bust. It provides higher stability and a secure fit, which can be especially helpful for fuller busts.
Triangle cup
A triangle cup has a triangular shape and is common in bralettes and light-support styles. It is designed for comfort and a natural look, with a more flexible structure and fewer seams.
Moulded (foam) cup
A moulded (foam) cup keeps its shape even off the body. Its purpose is to create a rounded silhouette and a smooth finish under thin fabrics, without necessarily adding push-up lift.
| Cup Type | Key Features | Best for... |
|---|---|---|
| Non-padded | No padding, natural finish, light support. | A natural look and “barely there” feel. |
| Push-up | Designed to lift and bring volume to the centre. | Lower necklines or a more defined cleavage effect. |
| Balconette | Lower cut with gentle lift and a flattering neckline. | Square necklines and low-cut tops. |
| Full cup | More coverage for stability and secure support. | Fuller busts that want a confident fit. |
| Triangle | Light structure, flexible fit, natural style. | Everyday comfort and relaxed outfits. |
| Moulded (foam) | Holds its shape and creates a smooth finish under clothing. | Avoiding visible lines under fitted or thin fabrics. |
How to choose the right bra cup
Choosing the right cup type is not only about aesthetics. It depends on your body, your bust shape, and how you plan to wear the bra. A bra for a long workday is not the same as a bra for relaxing at home.
How to work out your cup size
To estimate your bra size, you only need a tape measure and two basic measurements:
- Measure your underbust: wrap the tape around your ribcage, just under the bust, keeping it level and snug.
- Measure your bust: wrap the tape around the fullest part of the bust (across the nipples) without tightening.
Your cup letter is determined by the difference between these two measurements. If you are unsure, use the official Ysabel Mora size guide to match your measurements to your ideal size.
How to know which bra cup type you need
A practical way to choose is to think about your day and the finish you want under your clothes:
- For work: moulded cups with breathable fabrics for a smooth, discreet finish.
- For relaxing: wireless styles and soft fabrics (such as cotton) for maximum comfort.
- For special occasions: balconette or push-up cups if you want a more open neckline or a defined shape.
Why choosing the right bra cup matters
Wearing the wrong size is not only an aesthetic issue. It affects comfort, support and how the bra behaves throughout the day. A good bra should move with you, not distract you.
Daily comfort: the difference you actually feel
At Ysabel Mora, we focus on details that make comfort practical. Our brand idea “Welcome to yourself” is built around feeling good in your own skin, with soft fabrics and patterns designed to fit naturally.
When you do not have to think about slipping cups or uncomfortable pressure, you have more freedom to focus on what matters: you. Comfort is not a luxury. It is the baseline for confidence.
How to care for bras with different cup types
To help your bra cups keep their shape and elasticity for longer, these habits make a real difference:
- Gentle washing: whenever possible, hand-wash your bras. If you use a machine, choose a mesh laundry bag.
- Air dry: avoid tumble drying, as heat can damage elastic fibres. Let bras dry naturally, away from direct sun.
- Store without folding moulded cups: for moulded or push-up bras, avoid nesting one cup inside the other. Lay them flat to preserve the shape.
Explore the collection and discover how the right mix of design and comfort can change your day. Find your ideal bra in the Ysabel Mora bra collection: support, comfort and style in one place.
